Remove outdated gmail app data and tests

The test no longer runs after removed support for main-dex-list

Bug: b/181858113
Change-Id: I43cbfc2df00c884df6f95a3de4e6cf53942c0a30
diff --git a/tools/historic_memory_usage.py b/tools/historic_memory_usage.py
index a40cf2a..2256e28 100755
--- a/tools/historic_memory_usage.py
+++ b/tools/historic_memory_usage.py
@@ -17,7 +17,7 @@
 import sys
 import utils
 
-APPS = ['gmscore', 'nest', 'youtube', 'gmail', 'chrome']
+APPS = ['gmscore', 'nest', 'youtube', 'chrome']
 COMPILERS = ['d8', 'r8']
 
 
@@ -29,7 +29,6 @@
                       choices=COMPILERS)
     result.add_option('--app',
                       help='What app to run on',
-                      default='gmail',
                       choices=APPS)
     result.add_option('--top',
                       default=historic_run.top_or_default(),