Removes the incorrect coverage badge from the docs

[ebozduman]

The code coverage badge is decided to be removed from the docs, since the percentage number shown was incorrect. The removal is temporary until previously shown unit test coverage is going to be expanded and functional mint test coverage will also be included.

Description

Just removed the badge.

Motivation and Context

Ab's recommendation

Regression

No

How Has This Been Tested?

Reviewed the docs touched.

Types of changes

• 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 change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added unit tests to cover my changes.
• I have added/updated functional tests in mint. (If yes, add mint PR # here: )
• All new and existing tests passed.

[minio-ops]

Mint Automation

Test	Result
mint-compression-xl.sh	✔️
mint-large-bucket.sh	✔️
mint-compression-dist-xl.sh	✔️
mint-compression-fs.sh	✔️
mint-worm.sh	✔️
mint-fs.sh	✔️
mint-dist-xl.sh	✔️
mint-gateway-nas.sh	✔️
mint-xl.sh	❌ more...

7651-f9c15c1/mint-xl.sh.log:

Running with
SERVER_ENDPOINT:      72.28.97.61:30627
ACCESS_KEY:           minio
SECRET_KEY:           ***REDACTED***
ENABLE_HTTPS:         0
SERVER_REGION:        us-east-1
MINT_DATA_DIR:        /mint/data
MINT_MODE:            full
ENABLE_VIRTUAL_STYLE: 0

To get logs, run 'docker cp dfb9a88db126:/mint/log /tmp/mint-logs'

(1/14) Running aws-sdk-go tests ... FAILED in 6 minutes and 0 seconds
{
  "alert": "",
  "args": {
    "bucketName": "aws-sdk-go-test-csepmaex4vodir",
    "expiry": 60000000000,
    "objectName": "presignedTest"
  },
  "duration": 360015,
  "error": "XMinioServerNotInitialized: Server not initialized, please try again.\n\tstatus code: 503, request id: 159F03A68FF418EB, host id: ",
  "function": "PresignedPut",
  "message": "AWS SDK Go CreateBucket Failed",
  "name": "aws-sdk-go",
  "status": "FAIL"
}

Executed 0 out of 14 tests successfully.

[codecov]

Codecov Report

Merging #7651 into master will increase coverage by 0.48%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7651      +/-   ##
==========================================
+ Coverage   46.76%   47.25%   +0.48%     
==========================================
  Files         283      295      +12     
  Lines       36665    47475   +10810     
==========================================
+ Hits        17148    22434    +5286     
- Misses      17429    22951    +5522     
- Partials     2088     2090       +2

Impacted Files	Coverage Δ
cmd/disk-usage.go	78.94% <0%> (-21.06%)	⬇️
cmd/service.go	27.27% <0%> (-10.23%)	⬇️
cmd/gateway-main.go	14.95% <0%> (-7.37%)	⬇️
pkg/madmin/utils.go	16.66% <0%> (-7.15%)	⬇️
cmd/config-dir.go	40.74% <0%> (-7.09%)	⬇️
cmd/globals.go	55.88% <0%> (-7.09%)	⬇️
cmd/auth-handler.go	67.89% <0%> (-6.01%)	⬇️
cmd/server-rlimit.go	54.16% <0%> (-5.84%)	⬇️
pkg/policy/id.go	68.42% <0%> (-4.92%)	⬇️
cmd/gateway-env.go	28.57% <0%> (-4.77%)	⬇️
... and 261 more

---

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[kannappanr]

LGTM