remove dependency overrides in package:build to prep for publish (#1875)

build/pubspec.yaml

@@ -18,26 +18,8 @@ dependencies:
 
 dev_dependencies:
   build_resolvers: ^0.2.2+4
-  build_runner: ^0.9.0
+  build_runner: ^1.0.0
   build_test: ^0.10.0
   build_vm_compilers: ^0.1.0
   pedantic: ^1.0.0
   test: ^1.2.0
-
-dependency_overrides:
-  build_config:
-    path: ../build_config
-  build_modules:
-    path: ../build_modules
-  build_runner:
-    path: ../build_runner
-  build_runner_core:
-    path: ../build_runner_core
-  build_resolvers:
-    path: ../build_resolvers
-  build_test:
-    path: ../build_test
-  build_vm_compilers:
-    path: ../build_vm_compilers
-  scratch_space:
-    path: ../scratch_space