[gobject-introspection] Remove unused define GIREPO_DEFAULT_SEARCH_PATH.

[Rico Tzschichholz <ricotz src gnome org>]

commit 85cd91c1fed9f4d228dc19315918d30af749b7ca
Author: Tomasz Miąsko <tomasz miasko gmail com>
Date:   Thu Apr 26 00:00:00 2018 +0000

    Remove unused define GIREPO_DEFAULT_SEARCH_PATH.

 Makefile-tools.am | 6 ++----
 tools/meson.build | 2 --
 2 files changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/Makefile-tools.am b/Makefile-tools.am
index 95293735..b2e830f7 100644
--- a/Makefile-tools.am
+++ b/Makefile-tools.am
@@ -23,8 +23,7 @@ g-ir-doc-tool: tools/g-ir-tool-template.in _giscanner.la Makefile
        @chmod a+x $@
 
 g_ir_compiler_SOURCES = tools/compiler.c
-g_ir_compiler_CPPFLAGS = -DGIREPO_DEFAULT_SEARCH_PATH="\"$(libdir)\"" \
-                        -I$(top_srcdir)/girepository
+g_ir_compiler_CPPFLAGS = -I$(top_srcdir)/girepository
 g_ir_compiler_CFLAGS = $(GIO_CFLAGS)
 g_ir_compiler_LDADD = \
        libgirepository-internals.la    \
@@ -32,8 +31,7 @@ g_ir_compiler_LDADD = \
        $(GIREPO_LIBS)
 
 g_ir_generate_SOURCES = tools/generate.c
-g_ir_generate_CPPFLAGS = -DGIREPO_DEFAULT_SEARCH_PATH="\"$(libdir)\"" \
-                        -I$(top_srcdir)/girepository
+g_ir_generate_CPPFLAGS = -I$(top_srcdir)/girepository
 g_ir_generate_CFLAGS = $(GIO_CFLAGS)
 g_ir_generate_LDADD = \
        libgirepository-internals.la    \
diff --git a/tools/meson.build b/tools/meson.build
index e32937bf..8971a9d5 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -31,7 +31,6 @@ endforeach
 girscanner = tool_output[0]
 
 gircompiler = executable('g-ir-compiler', 'compiler.c',
-  c_args: '-DGIREPO_DEFAULT_SEARCH_PATH="@0"'.format(libdir_abs),
   dependencies: [
     girepo_internals_dep,
     girepo_dep,
@@ -40,7 +39,6 @@ gircompiler = executable('g-ir-compiler', 'compiler.c',
 )
 
 girgenerate = executable('g-ir-generate', 'generate.c',
-  c_args: '-DGIREPO_DEFAULT_SEARCH_PATH="@0"'.format(libdir_abs),
   dependencies: [
     girepo_internals_dep,
     girepo_dep,