Remove arm_float_abi=hard from GYP_DEFINES

scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_linux_linux_arm_compile.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "tryserver.chromium.linux",
       "--builder",
       "linux_arm_compile",
@@ skipping 59 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CROSSCOMPILE": "1",
-      "GYP_DEFINES": "arm_float_abi=hard component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=arm test_isolation_mode=prepare use_goma=1"
+      "GYP_DEFINES": "component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=arm test_isolation_mode=prepare use_goma=1"
     },
     "name": "gclient runhooks (with patch)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/src/testing/buildbot/chromium.fyi.json",
       "/path/to/tmp/json"
@@ skipping 83 matching lines @@
       "@@@STEP_LOG_LINE@analyze_details@  \"compile_targets\": [], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"original_compile_targets\": [], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"original_exes\": [], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"self.m.filter.compile_targets\": [], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"self.m.filter.matching_exes\": []@@@",
       "@@@STEP_LOG_LINE@analyze_details@}@@@",
       "@@@STEP_LOG_END@analyze_details@@@"
     ]
   }
 ]