Stop running tiles_rt-gpu on the bots

tools/dm_flags.json

Index: tools/dm_flags.json
diff --git a/tools/dm_flags.json b/tools/dm_flags.json
index b82ce331cba822c3727c1beb92025d26841fa448..a075e4e2034de6195eb1e13e3e4b711db6aced8d 100644
--- a/tools/dm_flags.json
+++ b/tools/dm_flags.json
@@ -15,7 +15,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -169,7 +168,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--threads", 
     "0", 
     "--blacklist", 
@@ -322,7 +320,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--threads", 
     "0", 
     "--blacklist", 
@@ -462,10 +459,6 @@
     "image", 
     "subset", 
     "_", 
-    "tiles_rt-gpu", 
-    "gm", 
-    "_", 
-    "imagefilterscropped", 
     "--match", 
     "~tabl_mozilla_0", 
     "~desk_yahoonews_0"
@@ -478,7 +471,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -630,7 +622,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -937,7 +928,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -1072,7 +1062,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -1231,7 +1220,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "--blacklist", 
     "gpu", 
     "_", 
@@ -1389,7 +1377,6 @@
     "serialize-8888", 
     "tiles_rt-8888", 
     "pipe-8888", 
-    "tiles_rt-gpu", 
     "angle", 
     "--blacklist", 
     "gpu",