Remove debug log when reading config is failed

[rafiramadhana]

Description

Remove debug log when reading config is failed.

• Fixes Debug message: Config File \".mockery\" Not Found in... #613

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Version of Golang used when building/testing:

• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20

How Has This Been Tested?

➜  mockery git:(neverbeenthisweeb/613-remove-debug-msg) go-task test 
task: [test] go test -v -coverprofile=coverage.txt ./...

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01110 ⚠️

Comparison is base (5fabc1d) 76.21269% compared to head (4c99dea) 76.20159%.

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master        #615         +/-   ##
===================================================
- Coverage   76.21269%   76.20159%   -0.01110%     
===================================================
  Files              7           7                 
  Lines           2144        2143          -1     
===================================================
- Hits            1634        1633          -1     
  Misses           374         374                 
  Partials         136         136                 

Impacted Files	Coverage Δ
cmd/mockery.go	62.53776% <ø> (-0.11284%)	⬇️

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