Remove obsolete Docker Argument

Author: BloodStainedCrow

.devcontainer.json

@@ -2,10 +2,7 @@
 // https://github.com/microsoft/vscode-dev-containers/tree/v0.154.2/containers/cpp
 {
 	"build": {
-		"dockerfile": "docker/Dockerfile",
-		"args": {
-			"DEVCONTAINER": "true"
-		}
+		"dockerfile": "docker/Dockerfile"
 	},
 	"customizations": {
 		"vscode": {

.vscode/c_cpp_properties.json

@@ -37,4 +37,4 @@
         }
     ],
     "version": 4
-}
+}

docker/Dockerfile

@@ -1,6 +1,5 @@
 FROM ubuntu:22.04
 
-ARG DEVCONTAINER
 ARG DEBIAN_FRONTEND=noninteractive
 ARG NODE_MAJOR=20
 RUN apt-get update -qq \