Remove "techpreview" filter on verify job

`oc` is planning on introducing feature gated tests that would run
/against/ a normal cluster (i.e. a CI job that doesn't have
featureset=techpreview).  In order to collect these results, we need to
remove the filter on featureset=techpreview.

For other FG, the tests only appear in jobs that are techpreview, so I
believe removing this filter from Sippy's queries is a net neutral
change.

Author: stbenjam

tools/codegen/pkg/sippy/json_types.go

@@ -50,12 +50,6 @@ func QueriesFor(cloud, architecture, topology, networkStack, testPattern string)
 	queries := []*SippyQueryStruct{
 		{
 			Items: []SippyQueryItem{
-				{
-					ColumnField:   "variants",
-					Not:           false,
-					OperatorValue: "contains",
-					Value:         "FeatureSet:techpreview",
-				},
 				{
 					ColumnField:   "variants",
 					Not:           false,