remove unnecessary usage of renderableGasButton logic

[brad-decker]

Explanation

We are getting gasEstimateType by examining which button of the old gas buttons UI was selected. We only used this value for a legacy metric event for transactions we no longer use.

More Information

Fixes #15415

[metamaskbot]

Builds ready [e9f8475]

• builds: chrome, firefox, opera
• builds (beta): chrome, firefox, opera
• builds (flask): chrome, firefox, opera
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• code coverage: Report
• storybook: Storybook
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1658 ± 53 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	83	134	104	14	7
		domContentLoaded	1499	1880	1630	96	46
		load	1499	1883	1658	110	53
		domInteractive	1499	1880	1630	96	46

highlights:

storybook

• ui/pages/send/send-footer/send-footer.stories.js

[PeterYinusa]

LGTM!