Remove CORES env variable from devcontainer (#9662)

.devcontainer/devcontainer.json

@@ -8,7 +8,7 @@
 			},
 			"options": ["--platform=linux/amd64"]
 	},
-	"runArgs": ["--env-file", "/tmp/devcontainer.env", "--platform=linux/amd64"],
+	"runArgs": ["--platform=linux/amd64"],
     "features": {
         "ghcr.io/devcontainers/features/desktop-lite:1": {
 			"password": "orca"
@@ -23,9 +23,6 @@
 					"-DBBL_INTERNAL_TESTING=0",
 					"-DSLIC3R_STATIC=1",
 					"-DCMAKE_PREFIX_PATH=${workspaceFolder}/deps/build/destdir/usr/local"
-				],
-				"cmake.buildToolArgs": [
-					"-l${containerEnv:CORES}"
 				]
 			},
 			
@@ -47,10 +44,6 @@
 	"otherPortsAttributes": {
 		"onAutoForward": "ignore"
 	},
-	
-	"initializeCommand": {
-		"Setup Temporary Env File": "echo \"CORES=`nproc --all`\" > /tmp/devcontainer.env"
-	},
 	"onCreateCommand": {
 		"Set postCreate executable flag": "chmod +x .devcontainer/postCreate.sh"
 	},