Remove unused results field from pr and tr specs

[dibyom]

Changes

Fixes #1243
The results field is unused, was deprecated in 0.7, and was
scheduled to be removed in the 0.8 release

Co-authored-by: Daniel Helfand dhelfand@redhat.com
Signed-off-by: Dibyo Mukherjee dibyo@google.com

Submitter Checklist

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• Includes tests (if functionality changed/added)
• Includes docs (if user facing)
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Release Notes

The `results` field has been removed from the TaskRun and PipelineRun spec

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[ghost]

/lgtm

[tekton-robot]

The following is the coverage report on pkg/.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1alpha1/pipelineresource_validation.go	89.4%	88.7%	-0.7
pkg/apis/pipeline/v1alpha1/pipelinerun_validation.go	89.5%	93.8%	4.3
pkg/apis/pipeline/v1alpha1/taskrun_validation.go	91.3%	95.3%	4.0
pkg/reconciler/pipelinerun/pipelinerun.go	82.7%	82.6%	-0.1

[googlebot]

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(Googler, please make sure the reason for overriding the CLA status is clearly documented in these comments.)

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[dibyom]

Daniel has previously committed to pipelines so I'm guessing its the co-authorship that messed up the CLA

[dlorenc]

/approve

[tekton-robot]

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[danielhelfand]

@dibyom Thanks for the co-authorship!