Remove default gitRef for deploy workflow #339

Job	Run time
Integration tests	3m 25s
Lint Ruby / Run RuboCop	13s
Security Analysis / Run Brakeman	15s
Lint JavaScript / Run Standardx	15s
Lint SCSS / Run Stylelint	10s
Test JavaScript / Run Jasmine	53s
Test Ruby / Run RSpec	2m 27s
	7m 38s

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