remove TransactionKind.NO_MERGE as it seems to have no use cases

platform/core-api/src/com/intellij/openapi/application/TransactionGuard.java

@@ -94,7 +94,7 @@ public abstract class TransactionGuard {
    * @param transaction code to execute inside a transaction.
    */
   public static void submitTransaction(@NotNull Runnable transaction) {
-    getInstance().submitMergeableTransaction(TransactionKind.NO_MERGE, transaction);
+    getInstance().submitMergeableTransaction(TransactionKind.ANY_CHANGE, transaction);
   }
 
   /**

platform/core-api/src/com/intellij/openapi/application/TransactionKind.java

@@ -27,11 +27,6 @@ public interface TransactionKind {
    */
   TransactionKind TEXT_EDITING = Common.TEXT_EDITING;
 
-  /**
-   * Same as {@link Common#NO_MERGE}
-   */
-  TransactionKind NO_MERGE = Common.NO_MERGE;
-
   /**
    * Same as {@link Common#ANY_CHANGE}
    */
@@ -56,11 +51,7 @@ public interface TransactionKind {
      * <li>Project root set change
      * <li>Dumb mode (reindexing) start/finish, (see {@link com.intellij.openapi.project.DumbService}).
      */
-    ANY_CHANGE,
+    ANY_CHANGE
 
-    /**
-     * Transactions of this kind won't be merged into other transactions
-     */
-    NO_MERGE
   }
 }

platform/core-api/src/com/intellij/openapi/application/WrapInTransaction.java

@@ -18,5 +18,5 @@ public @interface WrapInTransaction {
   /**
    * @return the kind of transaction to wrap the action into. By default, it's {@link TransactionKind#NO_MERGE}.
    */
-  TransactionKind.Common value() default TransactionKind.Common.NO_MERGE;
+  TransactionKind.Common value() default TransactionKind.Common.ANY_CHANGE;
 }

platform/core-impl/src/com/intellij/openapi/application/TransactionGuardImpl.java

@@ -41,7 +41,7 @@ public class TransactionGuardImpl extends TransactionGuard {
   @NotNull
   public AccessToken startSynchronousTransaction(@NotNull TransactionKind kind) throws IllegalStateException {
     ApplicationManager.getApplication().assertIsDispatchThread();
-    if (kind != TransactionKind.NO_MERGE && myMergeableKinds.contains(kind)) {
+    if (myMergeableKinds.contains(kind)) {
       return AccessToken.EMPTY_ACCESS_TOKEN;
     }
     if (myTransactionStartTrace != null) {
@@ -71,7 +71,7 @@ public class TransactionGuardImpl extends TransactionGuard {
 
         Runnable next = myQueue.poll();
         if (next != null) {
-          runSyncTransaction(TransactionKind.NO_MERGE, next);
+          runSyncTransaction(TransactionKind.ANY_CHANGE, next);
         }
       }
     }, app.getDisposed());
@@ -118,7 +118,7 @@ public class TransactionGuardImpl extends TransactionGuard {
   }
 
   protected boolean canRunTransactionNow(@NotNull TransactionKind kind) {
-    return !isInsideTransaction() || kind != TransactionKind.NO_MERGE && myMergeableKinds.contains(kind);
+    return !isInsideTransaction() || myMergeableKinds.contains(kind);
   }
 
   @Override