Remove pandas docstrings

Local patch of pandas-dev/pandas#46934

I don't expect this to make a user-noticeable improvement, but it seems
worth doing regardless. Locally I see a reduction from 4546988 for the
whole wheel to 4545234 (so just under 1k) although some of the .so's
inside are a few kB smaller.

Author: wlach

packages/pandas/meta.yaml

@@ -5,7 +5,8 @@ source:
   url: https://files.pythonhosted.org/packages/5a/ac/b3b9aa2318de52e40c26ae7b9ce6d4e9d1bcdaf5da0899a691642117cf60/pandas-1.4.2.tar.gz
   sha256: 92bc1fc585f1463ca827b45535957815b7deb218c549b7c18402c322c7549a12
   patches:
-    - patches/fix_json_signature.patch
+    - patches/0001-fix_json_signature.patch
+    - patches/0002-PERF-Remove-docstrings-from-inline-cython-code.patch
 build:
   cflags:
     -Werror=implicit-function-declaration -Werror=mismatched-parameter-types

packages/pandas/patches/fix_json_signature.patch renamed to packages/pandas/patches/0001-fix_json_signature.patch

@@ -0,0 +1,31 @@
+From e073902997d05a30734cd08b23cef9274adcb2af Mon Sep 17 00:00:00 2001
+From: William Lachance <[email protected]>
+Date: Tue, 3 May 2022 15:55:12 -0400
+Subject: [PATCH] PERF: Remove docstrings from inline cython code
+
+These functions aren't externally available, and removing them saves
+a small amount of space (approximately 250k in the size of the generated
+.so's on a linux64 machine).
+---
+ setup.py | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/setup.py b/setup.py
+index 67b91c55dd..11e3494b72 100755
+--- a/setup.py
++++ b/setup.py
+@@ -46,8 +46,11 @@ try:
+         __version__ as _CYTHON_VERSION,
+     )
+     from Cython.Build import cythonize
++    from Cython.Compiler import Options
+ 
+     _CYTHON_INSTALLED = parse_version(_CYTHON_VERSION) >= parse_version(min_cython_ver)
++    Options.docstrings = False
++
+ except ImportError:
+     _CYTHON_VERSION = None
+     _CYTHON_INSTALLED = False
+-- 
+2.34.1
+