refactor: cleanup unused including

[Jaguar16]

Fix #1975

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Code cleanup in src/cmd/sql_cmd.h

As described in #1975

• What is the current behavior? (You can also link to an open issue here)

• What is the new behavior (if this is a feature change)?

[Jaguar16]

Hello, can an authorized person re-run the pr-linter workflow ? Or do you want me to open another PR ?

[codecov]

Codecov Report

Merging #1976 (33797cb) into main (06255ca) will increase coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #1976   +/-   ##
=========================================
  Coverage     75.61%   75.61%           
  Complexity      347      347           
=========================================
  Files           614      614           
  Lines        116987   116987           
  Branches       1022     1022           
=========================================
+ Hits          88461    88465    +4     
+ Misses        28317    28313    -4     
  Partials        209      209           

Impacted Files	Coverage Δ
src/cmd/sql_cmd.h	26.71% <ø> (ø)
src/cmd/sql_cmd_test.cc	99.60% <ø> (ø)
...s/query_response_time/deploy_query_response_time.h	81.25% <0.00%> (-18.75%)	⬇️
...atistics/query_response_time/query_response_time.h	78.26% <0.00%> (-4.35%)	⬇️
src/rpc/rpc_client.h	85.13% <0.00%> (-4.06%)	⬇️
.../query_response_time/deploy_query_response_time.cc	97.10% <0.00%> (-2.90%)	⬇️
src/zk/dist_lock.cc	81.81% <0.00%> (-1.52%)	⬇️
src/nameserver/name_server_impl.cc	42.65% <0.00%> (-0.14%)	⬇️
src/tablet/tablet_impl.cc	59.30% <0.00%> (+0.02%)	⬆️
src/client/tablet_client.cc	55.41% <0.00%> (+0.11%)	⬆️
... and 5 more

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[github-actions]

Linux Test Report

       57 files       196 suites   49m 54s ⏱️
  8 961 tests   8 957 ✔️ 4 💤 0 ❌
13 187 runs  13 183 ✔️ 4 💤 0 ❌

Results for commit 33797cb.

♻️ This comment has been updated with latest results.

[github-actions]

SDK Test Report

  75 files    75 suites   7m 0s ⏱️
163 tests 161 ✔️ 2 💤 0 ❌
204 runs  202 ✔️ 2 💤 0 ❌

Results for commit 33797cb.

[dl239]

Hello, can an authorized person re-run the pr-linter workflow ? Or do you want me to open another PR ?

pr-linter workflow has passed now. thank you