RFR: (trivial) 8215954: [testbug] Remove unnecessary casts in test/hotspot/gtest/threadHelper.inline.hpp

[David Holmes]

bug: https://bugs.openjdk.java.net/browse/JDK-8215954
webrev: http://cr.openjdk.java.net/~dholmes/8215954/webrev/

A leftover from JDK-8214097 that should have been cleaned up before pushing.

--- old/test/hotspot/gtest/threadHelper.inline.hpp	2018-12-28 
01:46:06.322790818 -0500
+++ new/test/hotspot/gtest/threadHelper.inline.hpp	2018-12-28 
01:46:04.506687440 -0500
@@ -51,7 +51,7 @@
    VMThreadBlocker() {}
    virtual ~VMThreadBlocker() {}
    const char* get_thread_name_string(char* buf, int buflen) const {
-    return (char*) "VMThreadBlocker";
+    return "VMThreadBlocker";
    }
    void run() {
      this->set_thread_state(_thread_in_vm);
@@ -95,7 +95,7 @@
    virtual ~JavaTestThread() {}

    const char* get_thread_name_string(char* buf, int buflen) const {
-    return (char*) "JavaTestThread";
+    return "JavaTestThread";
    }

    void pre_run() {

Thanks,
David