create-commit.sh has a hardcoded sha fro tree_sha and the ${json_file} is missing on lines 15 and 21

[ricardojfc]

Describe the bug
create-commit.sh has a hardcoded sha fro tree_sha and the ${json_file} variable is missing on lines 15 and 21

To Reproduce
Check lines 14, 15 and 21

Expected behavior
The tree sha shoudn't be hardcoded
On lines 15 and 21 you ${json} should be ${json_file}

[gm3dmo]

Given the create-commit.sh script does not work and is not used anywhere I have taken the cowards way out and removed it from The Power.

I added that file when I initially started on the power. It turns out creating commits is a multi step process you can see that demonstrated in:

run-testcase-tiny-app-code-signing which calls:

tiny-app-codesign-create-a-commit.sh
tiny-app-codesign-create-a-tree.sh
tiny-app-codesign-update-a-reference.sh