[ISSUE #8118] Remove redundant mod in client

[miles-ton]

Which Issue(s) This PR Fixes

Fixes #8118

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 42.85%. Comparing base (159a603) to head (64afe85).

Files	Patch %	Lines
...rocketmq/client/impl/factory/MQClientInstance.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8119      +/-   ##
=============================================
- Coverage      42.94%   42.85%   -0.10%     
+ Complexity     10387    10371      -16     
=============================================
  Files           1270     1270              
  Lines          88694    88693       -1     
  Branches       11401    11401              
=============================================
- Hits           38092    38005      -87     
- Misses         45914    45992      +78     
- Partials        4688     4696       +8     

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[RongtongJin]

LGTM