Revert of Added GYP defines to dump linux symbols for gpu perf bots and trybots.

scripts/slave/recipe_modules/chromium/config.py

Index: scripts/slave/recipe_modules/chromium/config.py
diff --git a/scripts/slave/recipe_modules/chromium/config.py b/scripts/slave/recipe_modules/chromium/config.py
index 9a8e5bfcf14b0bf2430e5d29821c0384bce0bd31..378841bfba43efb53f55c9d323365be7b391c4cc 100644
--- a/scripts/slave/recipe_modules/chromium/config.py
+++ b/scripts/slave/recipe_modules/chromium/config.py
@@ -487,7 +487,6 @@
 def trybot_flavor(c):
   fastbuild(c, optional=True)
   dcheck(c, optional=True)
-  linux_dump_symbols(c)
 
 @config_ctx()
 def gn_component_build(c):
@@ -751,11 +750,6 @@
   c.gyp_env.GYP_DEFINES['chrome_pgo_phase'] = 2
 
 @config_ctx()
-def linux_dump_symbols(c):
-  if c.TARGET_PLATFORM == 'linux':
-    c.gyp_env.GYP_DEFINES['linux_dump_symbols'] = 1
-
-@config_ctx()
 def v8_optimize_medium(c):
   c.gyp_env.GYP_DEFINES['v8_optimized_debug'] = 1
   c.gyp_env.GYP_DEFINES['v8_enable_slow_dchecks'] = 1