Remove redundant code

[TaoZou1]

Remove redundant code.
Use switch to replace some if clause.
Cast type in switch instead of in case clause

[codecov-commenter]

Codecov Report

❌ Patch coverage is 70.37037% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.83%. Comparing base (051011c) to head (afb25e3).

Files with missing lines	Patch %	Lines
cmd/main.go	0.00%	8 Missing ⚠️
pkg/nsx/services/common/store.go	0.00%	1 Missing and 1 partial ⚠️
pkg/nsx/services/securitypolicy/firewall.go	75.00%	2 Missing ⚠️
pkg/nsx/util/utils.go	33.33%	1 Missing and 1 partial ⚠️
pkg/nsx/services/inventory/builder.go	66.66%	1 Missing ⚠️
pkg/nsx/services/vpc/vpc.go	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1186      +/-   ##
==========================================
+ Coverage   73.81%   73.83%   +0.02%     
==========================================
  Files         141      141              
  Lines       22350    22342       -8     
==========================================
- Hits        16498    16497       -1     
+ Misses       4829     4824       -5     
+ Partials     1023     1021       -2     

Flag	Coverage Δ
unit-tests	73.83% <70.37%> (+0.02%)	⬆️

Files with missing lines	Coverage Δ
pkg/clean/clean.go	85.83% <100.00%> (ø)
pkg/clean/clean_service.go	64.76% <100.00%> (-0.17%)	⬇️
pkg/controllers/networkinfo/networkinfo_utils.go	78.99% <ø> (-0.09%)	⬇️
pkg/controllers/subnet/subnet_controller.go	70.04% <100.00%> (ø)
pkg/controllers/subnetset/subnetset_controller.go	75.12% <100.00%> (ø)
pkg/nsx/cluster.go	62.60% <ø> (ø)
pkg/nsx/services/common/policy_tree.go	77.17% <100.00%> (ø)
pkg/nsx/services/securitypolicy/builder.go	85.82% <100.00%> (+<0.01%)	⬆️
pkg/nsx/services/securitypolicy/expand.go	68.29% <100.00%> (+0.11%)	⬆️
pkg/nsx/services/securitypolicy/parse.go	96.42% <100.00%> (ø)
... and 8 more

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[zhengxiexie]

/e2e

[zhengxiexie]

/e2e

[zhengxiexie]

/e2e

[zhengxiexie]

/e2e

[TaoZou1]

/e2e