test: remove TestWaitForFilesInotifyError

This "simple" approach of using LD_PRELOAD to inject errors when using
inotify no longer works on glibc 2.34 and it's now much more complicated,
as we can see in discussions from https://stackoverflow.com/questions/15599026/how-can-i-intercept-dlsym-calls-using-ld-preload
or code from https://gitlab.com/torkel104/libstrangle/-/commit/720f0ba2ce4423ce5f3e7ebe135e126007365bac

This test was for reproduction of a very specific problem that does not
happen so much on modern linux which has a much higher limit of inotify
watches, the easiest is to remove this test now.

slapos/test/recipe/test_wrapper.py

@@ -221,49 +221,6 @@ class TestWaitForFiles(WrapperTestCase):
       self.fail('process did not start after file was created')
 
 
-@unittest.skipUnless(sys.platform.startswith("linux"), "Inotify is linux only")
-class TestWaitForFilesInotifyError(TestWaitForFiles):
-
-  def setUp(self):
-    super(TestWaitForFilesInotifyError, self).setUp()
-    # use LD_PRELOAD to inject errors into inotify_add_watch calls
-    inotify_mock_c = self.getTempPath('inotify_mock.c')
-    inotify_mock_o = self.getTempPath('inotify_mock.o')
-    inotify_mock_so = self.getTempPath('inotify_mock.so')
-    with open(inotify_mock_c, 'w') as f:
-      f.write('''
-        #include <sys/inotify.h>
-        #include <string.h>
-        #include <errno.h>
-
-        int inotify_add_watch(int fd, const char *pathname, uint32_t mask) {
-          errno = ENOSPC;
-          return -1;
-        }
-
-        /* This is a bit tricky because inotify_simple calls
-        inotify_add_watch with ctypes.CDLL("libc.so"), which uses
-        dlopen("libc.so") and dlsym("inotify_add_watch"), so we first
-        override dlsym to return our own inotify_add_watch.
-        https://github.com/chrisjbillington/inotify_simple/blob/55737898/inotify_simple.py#L110
-        */
-        extern void *__libc_dlsym (void *, const char *);
-        void *dlsym(void *handle, const char *symbol) {
-          if (strcmp(symbol, "inotify_add_watch") == 0) {
-            return (void *)inotify_add_watch;
-          }
-          return (void *)__libc_dlsym(handle, symbol);
-        }
-        ''')
-    subprocess.check_call(['gcc', '-c', '-fPIC', '-o', inotify_mock_o, inotify_mock_c])
-    subprocess.check_call(['gcc', '-shared', '-o', inotify_mock_so, inotify_mock_o])
-    self.env = dict(
-      os.environ,
-      PYTHONUNBUFFERED='1',
-      LD_PRELOAD=inotify_mock_so)
-
-  expected_output = 'Error using inotify, falling back to polling\ndone\n'
-
 
 class TestPrivateTmpFS(WrapperTestCase):
   def getOptions(self):