[lldb] Remove unused lldb.cpp

lldb.cpp is unused after llvm@ccf1469

Differential Revision: https://reviews.llvm.org/D115438

(cherry picked from commit eaf4f60)

Author: hokein

lldb/source/Version/Version.cpp

@@ -78,8 +78,8 @@ const char *lldb_private::GetVersion() {
       g_version_str += "\n  llvm revision ";
       g_version_str += llvm_rev;
     }
-  }
 #endif
+  }
 
   return g_version_str.c_str();
 }