Drop try except in harvest block for Guard

[SHAKOTN]

Let it fail without any error catching

Fixes: https://linear.app/gro/issue/GRO-548/drop-error-catching-in-gelato-guard

[codecov[bot]]

Codecov Report

Merging #104 (11d02e2) into master (ad20df4) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #104   +/-   ##
=======================================
  Coverage   71.23%   71.23%           
=======================================
  Files          15       15           
  Lines        1154     1154           
  Branches      260      260           
=======================================
  Hits          822      822           
+ Misses        225      223    -2     
- Partials      107      109    +2     

Impacted Files	Coverage Δ
contracts/strategy/keeper/GStrategyGuard.sol	64.05% <100.00%> (ø)

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