Zuul: remove explicit SQL reporters

These are deprecated and now produce a warning message.  The same
configuration is now implied.

Change-Id: I609838302d95a5878aabdb91242debec5b32b4b5

zuul.d/pipelines.yaml

@@ -21,11 +21,9 @@
       gerrit:
         # Note that gerrit keywords are case-sensitive.
         Verified: 1
-      mysql:
     failure:
       gerrit:
         Verified: -1
-      mysql:
 
 - pipeline:
     name: gate
@@ -60,11 +58,9 @@
       gerrit:
         Verified: 2
         submit: true
-      mysql:
     failure:
       gerrit:
         Verified: -2
-      mysql:
     window-floor: 20
     window-increase-factor: 2
 
@@ -81,10 +77,6 @@
       gerrit:
         - event: ref-updated
           ref: ^refs/heads/.*$
-    success:
-      mysql:
-    failure:
-      mysql:
 
 - pipeline:
     name: promote
@@ -102,10 +94,8 @@
         - event: change-merged
     success:
       gerrit: {}
-      mysql:
     failure:
       gerrit: {}
-      mysql:
 
 - pipeline:
     name: release
@@ -119,10 +109,6 @@
       gerrit:
         - event: ref-updated
           ref: ^refs/tags/[0-9]+(\.[0-9]+)*((a|b|rc)[0-9]+)?$
-    success:
-      mysql:
-    failure:
-      mysql:
 
 - pipeline:
     name: periodic
@@ -133,10 +119,6 @@
     trigger:
       timer:
         - time: '0 6 * * *'
-    success:
-      mysql:
-    failure:
-      mysql:
 
 - pipeline:
     name: tag
@@ -148,10 +130,6 @@
       gerrit:
         - event: ref-updated
           ref: ^refs/tags/.*$
-    success:
-      mysql:
-    failure:
-      mysql:
 
 - pipeline:
     name: experimental
@@ -169,7 +147,5 @@
           comment: (?i)^(Patch Set [0-9]+:)?( [\w\\+-]*)*(\n\n)?\s*check experimental\s*$
     success:
       gerrit: {}
-      mysql:
     failure:
       gerrit: {}
-      mysql: