Remove now unused release-it dependencies #813

Job	Run time
Legacy Mocha Tests - 16.x	37s
Legacy Mocha Tests - 14.x	36s
lint-all-packages	44s
Ember Tests (16.x, ubuntu-latest)	1m 7s
Test Packages (16.x, ubuntu-latest)	1m 27s
Ember Tests (16.x, windows-latest)	3m 31s
Test Packages (16.x, windows-latest)	3m 31s
Ember Tests (14.x, ubuntu-latest)	1m 3s
discover_matrix	38s
Test Packages (14.x, ubuntu-latest)	1m 25s
Ember Tests (14.x, windows-latest)	2m 45s
Test Packages (14.x, windows-latest)	3m 18s
ember-try for ember-cli-fastboot: ember-lts-3.16	1m 0s
ember-try for ember-cli-fastboot: ember-lts-3.20	52s
ember-try for ember-cli-fastboot: ember-lts-3.24	1m 9s
ember-try for ember-cli-fastboot: ember-lts-3.28	1m 3s
ember-try for ember-cli-fastboot: ember-lts-4.4	41s
ember-try for ember-cli-fastboot: ember-lts-4.8	49s
ember-try for ember-cli-fastboot: ember-lts-4.12	1m 4s
ember-try for ember-cli-fastboot: ember-lts-5.4	42s
ember-try for ember-cli-fastboot: ember-release	44s
ember-try for ember-cli-fastboot: ember-beta	1m 3s
ember-try for ember-cli-fastboot: ember-canary	1m 2s
ember-try for ember-cli-fastboot: embroider-safe	36s
ember-try for ember-cli-fastboot: embroider-optimized	33s
ember-try for ember-cli-fastboot: no-deprecations	43s
ember-try for ember-cli-fastboot: ember-release-no-deprecations	59s
custom-output-paths	45s
ember-cli-fastboot	36s
fastboot-config-location	35s
fastboot-express-middleware	38s
fastboot-location	42s
fastboot-shoebox-test	35s
integration-tests	1m 15s
oneerror-per-visit	58s
request-details	39s
root-url	34s
	40m 59s

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