Remove incorrect SdlException throw in SdlManager

[joeygrover]

Changelog

Remove unnecessary SdlException throw in SdlManager

CLA

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[codecov-io]

Codecov Report

Merging #911 into hotfix/4.7.1 will decrease coverage by 2.52%.
The diff coverage is 43.75%.

@@                Coverage Diff                @@
##             hotfix/4.7.1    #911      +/-   ##
=================================================
- Coverage           42.62%   40.1%   -2.53%     
- Complexity           3734    3739       +5     
=================================================
  Files                 434     434              
  Lines               23048   24633    +1585     
  Branches             2690    3077     +387     
=================================================
+ Hits                 9825    9879      +54     
- Misses              12577   14100    +1523     
- Partials              646     654       +8

Impacted Files	Coverage Δ	Complexity Δ
.../java/com/smartdevicelink/managers/SdlManager.java	44.23% <43.75%> (-0.92%)	50 <0> (ø)
...n/java/com/smartdevicelink/proxy/SdlProxyBase.java	5.48% <0%> (-1.08%)	20% <0%> (+5%)

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