removed removed operator and right operand

Author: jesswrd

script/tool/lib/src/common/package_looping_command.dart

@@ -340,7 +340,7 @@ abstract class PackageLoopingCommand extends PackageCommand {
     if (minFlutterVersion != null) {
       final Pubspec pubspec = package.parsePubspec();
       final VersionConstraint? flutterConstraint =
-          pubspec.environment?['flutter'];
+          pubspec.environment['flutter'];
       if (flutterConstraint != null &&
           !flutterConstraint.allows(minFlutterVersion)) {
         return PackageResult.skip(
@@ -350,7 +350,7 @@ abstract class PackageLoopingCommand extends PackageCommand {
 
     if (minDartVersion != null) {
       final Pubspec pubspec = package.parsePubspec();
-      final VersionConstraint? dartConstraint = pubspec.environment?['sdk'];
+      final VersionConstraint? dartConstraint = pubspec.environment['sdk'];
       if (dartConstraint != null && !dartConstraint.allows(minDartVersion)) {
         return PackageResult.skip('Does not support Dart $minDartVersion');
       }

script/tool/lib/src/create_all_packages_app_command.dart

@@ -277,7 +277,7 @@ dependencies {}
     final Pubspec originalPubspec = app.parsePubspec();
     const String dartSdkKey = 'sdk';
     final VersionConstraint dartSdkConstraint =
-        originalPubspec.environment?[dartSdkKey] ??
+        originalPubspec.environment[dartSdkKey] ??
             VersionConstraint.compatibleWith(
               Version.parse('3.0.0'),
             );
@@ -342,7 +342,7 @@ publish_to: none
 
 version: ${pubspec.version}
 
-environment:${_pubspecMapString(pubspec.environment!)}
+environment:${_pubspecMapString(pubspec.environment)}
 
 dependencies:${_pubspecMapString(pubspec.dependencies)}
 

script/tool/lib/src/pubspec_check_command.dart

@@ -488,9 +488,9 @@ class PubspecCheckCommand extends PackageLoopingCommand {
     }
 
     final Version? dartConstraintMin =
-        _minimumForConstraint(pubspec.environment?['sdk']);
+        _minimumForConstraint(pubspec.environment['sdk']);
     final Version? flutterConstraintMin =
-        _minimumForConstraint(pubspec.environment?['flutter']);
+        _minimumForConstraint(pubspec.environment['flutter']);
 
     // Validate the Flutter constraint, if any.
     if (flutterConstraintMin != null && minMinFlutterVersion != null) {

script/tool/lib/src/update_min_sdk_command.dart

@@ -87,7 +87,7 @@ class UpdateMinSdkCommand extends PackageLoopingCommand {
   /// Returns the given "environment" section's [key] constraint as a range,
   /// if the key is present and has a range.
   VersionRange? _sdkRange(Pubspec pubspec, String key) {
-    final VersionConstraint? constraint = pubspec.environment?[key];
+    final VersionConstraint? constraint = pubspec.environment[key];
     if (constraint is VersionRange) {
       return constraint;
     }

script/tool/test/create_all_packages_app_command_test.dart

@@ -356,7 +356,7 @@ android {
       final Pubspec generatedPubspec = command.app.parsePubspec();
 
       const String dartSdkKey = 'sdk';
-      expect(generatedPubspec.environment?[dartSdkKey].toString(),
+      expect(generatedPubspec.environment[dartSdkKey].toString(),
           existingSdkConstraint);
     });
 

script/tool/test/update_min_sdk_command_test.dart

@@ -50,7 +50,7 @@ void main() {
     ]);
 
     final String dartVersion =
-        package.parsePubspec().environment?['sdk'].toString() ?? '';
+        package.parsePubspec().environment['sdk'].toString();
     expect(dartVersion, '^3.1.0');
   });
 
@@ -65,7 +65,7 @@ void main() {
     ]);
 
     final String dartVersion =
-        package.parsePubspec().environment?['sdk'].toString() ?? '';
+        package.parsePubspec().environment['sdk'].toString();
     expect(dartVersion, '^3.1.0');
   });
 
@@ -80,7 +80,7 @@ void main() {
     ]);
 
     final String dartVersion =
-        package.parsePubspec().environment?['sdk'].toString() ?? '';
+        package.parsePubspec().environment['sdk'].toString();
     expect(dartVersion, '^3.2.0');
   });
 
@@ -98,9 +98,9 @@ void main() {
     ]);
 
     final String dartVersion =
-        package.parsePubspec().environment?['sdk'].toString() ?? '';
+        package.parsePubspec().environment['sdk'].toString();
     final String flutterVersion =
-        package.parsePubspec().environment?['flutter'].toString() ?? '';
+        package.parsePubspec().environment['flutter'].toString();
     expect(dartVersion, '^3.1.0');
     expect(flutterVersion, '>=3.13.0');
   });
@@ -119,9 +119,9 @@ void main() {
     ]);
 
     final String dartVersion =
-        package.parsePubspec().environment?['sdk'].toString() ?? '';
+        package.parsePubspec().environment['sdk'].toString();
     final String flutterVersion =
-        package.parsePubspec().environment?['flutter'].toString() ?? '';
+        package.parsePubspec().environment['flutter'].toString();
     expect(dartVersion, '^3.2.0');
     expect(flutterVersion, '>=3.16.0');
   });