Minor: remove waring about annotation absence in JetScope class

compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WriteThroughScope.java

@@ -47,7 +47,7 @@ public class WriteThroughScope extends WritableScopeWithImports {
 
     @Override
     @NotNull
-    public Collection<DeclarationDescriptor> getDeclarationsByLabel(LabelName labelName) {
+    public Collection<DeclarationDescriptor> getDeclarationsByLabel(@NotNull LabelName labelName) {
         checkMayRead();
 
         return writableWorker.getDeclarationsByLabel(labelName);

core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/scope/JavaClassMembersScope.java

@@ -37,7 +37,7 @@ public abstract class JavaClassMembersScope extends JavaBaseScope {
 
     @NotNull
     @Override
-    public Collection<DeclarationDescriptor> getDeclarationsByLabel(LabelName labelName) {
+    public Collection<DeclarationDescriptor> getDeclarationsByLabel(@NotNull LabelName labelName) {
         throw new UnsupportedOperationException(); // TODO
     }
 

core/descriptors/src/org/jetbrains/jet/lang/resolve/scopes/AbstractScopeAdapter.java

@@ -74,7 +74,7 @@ public abstract class AbstractScopeAdapter implements JetScope {
 
     @NotNull
     @Override
-    public Collection<DeclarationDescriptor> getDeclarationsByLabel(LabelName labelName) {
+    public Collection<DeclarationDescriptor> getDeclarationsByLabel(@NotNull LabelName labelName) {
         return getWorkerScope().getDeclarationsByLabel(labelName);
     }
 

core/descriptors/src/org/jetbrains/jet/lang/resolve/scopes/InnerClassesScopeWrapper.java

@@ -54,7 +54,7 @@ public class InnerClassesScopeWrapper extends AbstractScopeAdapter {
 
     @NotNull
     @Override
-    public Collection<DeclarationDescriptor> getDeclarationsByLabel(LabelName labelName) {
+    public Collection<DeclarationDescriptor> getDeclarationsByLabel(@NotNull LabelName labelName) {
         return Collections2.filter(actualScope.getDeclarationsByLabel(labelName), IS_CLASS);
     }
 

core/descriptors/src/org/jetbrains/jet/lang/resolve/scopes/JetScopeImpl.java

@@ -59,7 +59,7 @@ public abstract class JetScopeImpl implements JetScope {
 
     @NotNull
     @Override
-    public Collection<DeclarationDescriptor> getDeclarationsByLabel(LabelName labelName) {
+    public Collection<DeclarationDescriptor> getDeclarationsByLabel(@NotNull LabelName labelName) {
         return Collections.emptyList();
     }