Remove thumbnail generation code #10884

Job	Run time
Dependency Review scan / dependency-review-pr	7s
Dependency Review scan / dependency-review-push	0s
CodeQL SAST scan / Analyze	2m 16s
Lint ERB / Run ERB lint	40s
Prettier / Run Prettier	17s
Lint SCSS / Run Stylelint	14s
Security Analysis / Run Brakeman	48s
Lint JavaScript / Run Standardx	20s
Lint Ruby / Run RuboCop	31s
Test JavaScript / Run Jasmine	36s
Test features / feature-test-matrix (cucumber:ok)	5m 34s
Test Ruby / minitest-matrix (4, 0)	2m 43s
Test Ruby / minitest-matrix (4, 1)	3m 5s
Test Ruby / minitest-matrix (4, 2)	3m 14s
Test Ruby / minitest-matrix (4, 3)	2m 46s
Test Ruby / Run Minitest	1s
Test features / Run Cucumber	1s
	23m 13s

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