Fixes from running 2.0.0-beta.1 release
Fixes from running 2.0.0-beta.1 release

This provides the following fixes:
1. Remove logic to delete release branch because that branch is no longer used.
2. Fix --validateRelease to not verifyShasums when release is in draft mode.

electron/electron,electron/electron,shiftkey/electron,gerhardberger/electron,gerhardberger/electron,bpasero/electron,bpasero/electron,shiftkey/electron,electron/electron,gerhardberger/electron,the-ress/electron,electron/electron,seanchas116/electron,bpasero/electron,shiftkey/electron,the-ress/electron,the-ress/electron,gerhardberger/electron,bpasero/electron,seanchas116/electron,bpasero/electron,seanchas116/electron,seanchas116/electron,seanchas116/electron,gerhardberger/electron,bpasero/electron,gerhardberger/electron,shiftkey/electron,the-ress/electron,seanchas116/electron,electron/electron,electron/electron,bpasero/electron,gerhardberger/electron,the-ress/electron,shiftkey/electron,the-ress/electron,the-ress/electron,electron/electron,shiftkey/electron