Cleanup and deprecate old git executable validation

plugins/git4idea/src/git4idea/GitVcs.java

@@ -410,6 +410,7 @@ public class GitVcs extends AbstractVcs<CommittedChangeList> {
            : Collections.emptyList();
   }
 
+  @Deprecated
   @NotNull
   public GitExecutableValidator getExecutableValidator() {
     return myExecutableValidator;

plugins/git4idea/src/git4idea/config/GitExecutableValidator.java

@@ -32,7 +32,9 @@ import java.util.Map;
  * and to display notification to the user proposing to fix the project set up.
  *
  * @author Kirill Likhodedov
+ * @deprecated in favor of {@link GitExecutableManager#identifyVersion(String)} and {@link GitExecutableProblemsNotifier}
  */
+@Deprecated
 public class GitExecutableValidator extends ExecutableValidator {
 
   public GitExecutableValidator(@NotNull Project project) {
@@ -54,18 +56,4 @@ public class GitExecutableValidator extends ExecutableValidator {
   public boolean isExecutableValid(@NotNull String executable) {
     return doCheckExecutable(executable, Collections.singletonList("--version"), GitHandler.getGitTraceEnvironmentVariables());
   }
-
-  /**
-   * Checks if git executable is valid. If not (which is a common case for low-level vcs exceptions), shows the
-   * notification. Otherwise throws the exception.
-   * This is to be used in catch-clauses
-   *
-   * @param e exception which was thrown.
-   * @throws VcsException if git executable is valid.
-   */
-  public void showNotificationOrThrow(VcsException e) throws VcsException {
-    if (checkExecutableAndNotifyIfNeeded()) {
-      throw e;
-    }
-  }
 }