deps: remove test-related GYP files

- Less files to maintain.
- We don't use them.
- We build with GN to run V8 tests.

Fixes: #25095
Refs: #25010

PR-URL: #25097
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>

deps/v8/gypfiles/all.gyp

@@ -9,7 +9,6 @@
       'type': 'none',
       'dependencies': [
         'd8.gyp:d8',
-        'inspector-test.gyp:*',
         'mkgrokdump.gyp:*',
       ],
       'conditions': [
@@ -22,9 +21,6 @@
         ['host_os!="mac" or OS!="android"', {
           'dependencies': [
             'samples.gyp:*',
-            'cctest.gyp:*',
-            'fuzzer.gyp:*',
-            'unittests.gyp:*',
           ],
         }],
       ]