Removes isPhysical fix in preparation for .graphqls editing support (#22)

Author: jimkyndemeyer

src/main/com/intellij/lang/jsgraphql/schema/psi/JSGraphQLSchemaFile.java

@@ -10,7 +10,6 @@
 import com.intellij.extapi.psi.PsiFileBase;
 import com.intellij.lang.jsgraphql.schema.JSGraphQLSchemaFileType;
 import com.intellij.lang.jsgraphql.schema.JSGraphQLSchemaLanguage;
-import com.intellij.lang.jsgraphql.schema.ide.project.JSGraphQLSchemaLanguageProjectService;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.psi.FileViewProvider;
 import com.intellij.psi.search.ProjectScope;
@@ -41,14 +40,4 @@ public FileType getFileType() {
     public String toString() {
         return "GraphQL Schema File";
     }
-
-    @Override
-    public boolean isPhysical() {
-        if(Boolean.TRUE.equals(getVirtualFile().getUserData(JSGraphQLSchemaLanguageProjectService.IS_GRAPHQL_SCHEMA_VIRTUAL_FILE))) {
-            // indicate that the psi file that backs the "GraphQL Schemas" project tree node is considered non-physical.
-            // this hides it from PSI file intentions etc.
-            return false;
-        }
-        return super.isPhysical();
-    }
 }