refactor: remove dead code #2702
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1 error and 4 warnings
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                  Process completed with exit code 2. 
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                          Spell Check with Typos: 
                        ./src/systems/system.jl#L792
                      
                       
                  "indepent" should be "independent". 
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                          Spell Check with Typos: 
                        ./src/systems/problem_utils.jl#L1610
                      
                       
                  "appent" should be "append". 
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                          Spell Check with Typos: 
                        ./src/modelingtoolkitize/common.jl#L290
                      
                       
                  "proble" should be "probe" or "probably" or "problem". 
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                          Spell Check with Typos: 
                        ./src/modelingtoolkitize/common.jl#L49
                      
                       
                  "proble" should be "probe" or "probably" or "problem". 
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