[gegl] build: do not run tests in perf folder by default

[Øyvind Kolås <ok src gnome org>]

commit 8a979c6f89cfe71a437c685b47e4244b2327427a
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon Mar 19 20:19:22 2018 +0100

    build: do not run tests in perf folder by default
    
    For some build systems with emulated targets this causes builds to time out,
    the GEGL build is already a long one without these cpu intensive long profiling
    runs.

 Makefile.am |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 2b6ff96..302ac84 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -15,7 +15,6 @@ SUBDIRS=\
        operations \
        examples \
        tests \
-       perf \
        po
 
 if ENABLE_DOCS