Cleanup: Remove unused Is64BitBlazeJavabase() function declaration.

This function has only a declaration, no implementation and thus no
uses. Confirmed that it has no uses internally as well.

--
Change-Id: Ifd9214b546f304077e4d729bf22abf6b49cc6af1
Reviewed-on: https://bazel-review.googlesource.com/1411
MOS_MIGRATED_REVID=94763256
diff --git a/src/main/cpp/blaze_util.h b/src/main/cpp/blaze_util.h
index b908fcf..9d53d7d 100644
--- a/src/main/cpp/blaze_util.h
+++ b/src/main/cpp/blaze_util.h
@@ -61,10 +61,6 @@
 // connected, or 80 if there is no such terminal.
 int GetTerminalColumns();
 
-// blaze's JVM arch is set at build time (--java_cpu), since the blaze java
-// process includes native code.
-bool Is64BitBlazeJavabase();
-
 // Adds JVM arguments particular to running blaze with JVM v3 or higher.
 void AddJVMSpecificArguments(const string &host_javabase,
                              std::vector<string> *result);