Simplify numpy detection job

Author: WillAyd

python/pyarrow/meson.build

@@ -23,16 +23,9 @@ if not numpy_dep.found()
         py,
         [
             '-c',
-            '''import os
+            '''
 import numpy as np
-try:
-    # Check if include directory is inside the pyarrow dir
-    # e.g. a venv created inside the pyarrow dir
-    # If so, convert it to a relative path
-    incdir = os.path.relpath(np.get_include())
-except Exception:
-    incdir = np.get_include()
-print(incdir)
+print(np.get_include())
 ''',
         ],
         check: true,