fix: remove all exports of routes when render mode is csr

[ClarkXia]

SSR and SSG both are disabled, it may also cause server error such as window is undefined when using onDemand compiling.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release/next@48c40ea). Click here to learn what that means.
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@               Coverage Diff               @@
##             release/next    #6140   +/-   ##
===============================================
  Coverage                ?   82.09%           
===============================================
  Files                   ?      200           
  Lines                   ?    18267           
  Branches                ?     2389           
===============================================
  Hits                    ?    14997           
  Misses                  ?     3236           
  Partials                ?       34           

Impacted Files	Coverage Δ
packages/ice/src/service/ServerRunner.ts	91.80% <75.00%> (ø)
packages/ice/src/createService.ts	87.98% <100.00%> (ø)

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