From f8bea6806bdc68af3cdad9cb30c6dd11fc837a27 Mon Sep 17 00:00:00 2001
From: Mathieu Baudet <mathieubaudet@fb.com>
Date: Sat, 17 Dec 2016 18:23:24 -0800
Subject: [PATCH] fbcode: remove unused includes from .cpp files with no #if
 and #define

Summary:
This is a first diff to remove the "easiest" unused includes in fbcode.

* For safety, we only touch .cpp files without #if and #define,
* We do not try to remove redundant systems headers (aka. "packing").

The diff was generated as follows:
```
foundation/scripts/ls-cpp-dirs | grep -v '^\(\.\.\|external/\|.*/external\)' | xargs ffmr -o /tmp/ffmr-diff-1 codegraph/scripts/ffmr/analyze_includes_no_headers_no_packing_skipping_ifdefs.sh

cat /tmp/ffmr-diff-1/*.diff | patch -p2
hg commit -m something
arc diff --prepare --nolint --nounit --less-context --excuse refactoring
```

Note: `grep -v` is just an optimization. The actual configuration is in these two files:
diffusion/FBS/browse/master/fbcode/codegraph/analysis/config.py
diffusion/FBS/browse/master/fbcode/codegraph/scripts/ffmr/analyze_includes_no_headers_no_packing_skipping_ifdefs.sh

See the task for more context, and the recent "safety" improvements on the tool.

depends on D4317825 for very few cases where `nolint` had to be manually added.

Reviewed By: igorsugak

Differential Revision: D4312617

fbshipit-source-id: ecc1f0addfd0651fa4770fcc43cd1314661a311a
---
 src/dictionary.cc | 1 -
 src/fasttext.cc   | 1 -
 src/utils.cc      | 1 -
 3 files changed, 3 deletions(-)

diff --git a/src/dictionary.cc b/src/dictionary.cc
index c0cd2c683..54b38dac7 100644
--- a/src/dictionary.cc
+++ b/src/dictionary.cc
@@ -15,7 +15,6 @@
 #include <algorithm>
 #include <iterator>
 #include <unordered_map>
-#include <cctype>
 
 namespace fasttext {
 
diff --git a/src/fasttext.cc b/src/fasttext.cc
index b85ec3544..026c50b80 100644
--- a/src/fasttext.cc
+++ b/src/fasttext.cc
@@ -9,7 +9,6 @@
 
 #include "fasttext.h"
 
-#include <fenv.h>
 #include <math.h>
 
 #include <iostream>
diff --git a/src/utils.cc b/src/utils.cc
index a0b261304..ea8726794 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -9,7 +9,6 @@
 
 #include "utils.h"
 
-#include <cmath>
 #include <ios>
 
 namespace fasttext {