Java: Address review comments.

java/ql/lib/semmle/code/java/dataflow/FlowSources.qll

@@ -41,7 +41,6 @@ abstract class RemoteFlowSource extends DataFlow::Node {
  */
 private module RemoteFlowSources {
   private import semmle.code.java.frameworks.android.Widget
-  private import semmle.code.java.security.TemplateInjection
 }
 
 private class ExternalRemoteFlowSource extends RemoteFlowSource {

java/ql/lib/semmle/code/java/frameworks/Jdbc.qll

@@ -2,7 +2,7 @@
  * Provides classes and predicates for working with the Java JDBC API.
  */
 
-private import java
+import java
 
 /*--- Types ---*/
 /** The interface `java.sql.Connection`. */

java/ql/lib/semmle/code/java/frameworks/Regex.qll

@@ -1,6 +1,6 @@
 /** Definitions related to `java.util.regex`. */
 
-private import java
+import java
 
 /** The class `java.util.regex.Pattern`. */
 class TypeRegexPattern extends Class {