refactor: remove Symbolics

Author: avik-pal

Project.toml

@@ -44,7 +44,6 @@ NLSolvers = "337daf1e-9722-11e9-073e-8b9effe078ba"
 NLsolve = "2774e3e8-f4cf-5e23-947b-6d7e65073b56"
 SIAMFANLEquations = "084e46ad-d928-497d-ad5e-07fa361a48c4"
 SpeedMapping = "f1835b91-879b-4a3f-a438-e4baacf14412"
-Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [extensions]
@@ -57,7 +56,6 @@ NonlinearSolveNLSolversExt = "NLSolvers"
 NonlinearSolveNLsolveExt = "NLsolve"
 NonlinearSolveSIAMFANLEquationsExt = "SIAMFANLEquations"
 NonlinearSolveSpeedMappingExt = "SpeedMapping"
-NonlinearSolveSymbolicsExt = "Symbolics"
 NonlinearSolveZygoteExt = "Zygote"
 
 [compat]

ext/NonlinearSolveSymbolicsExt.jl

@@ -37,8 +37,8 @@ using SciMLJacobianOperators: AbstractJacobianOperator, JacobianOperator, VecJac
 using SparseDiffTools: SparseDiffTools, AbstractSparsityDetection,
                        ApproximateJacobianSparsity, JacPrototypeSparsityDetection,
                        NoSparsityDetection, PrecomputedJacobianColorvec,
-                       SymbolicsSparsityDetection, init_jacobian, sparse_jacobian,
-                       sparse_jacobian!, sparse_jacobian_cache
+                       init_jacobian, sparse_jacobian, sparse_jacobian!,
+                       sparse_jacobian_cache
 using StaticArraysCore: StaticArray, SVector, SArray, MArray, Size, SMatrix
 using SymbolicIndexingInterface: SymbolicIndexingInterface, ParameterIndexingProxy,
                                  symbolic_container, parameter_values, state_values, getu,
@@ -55,6 +55,7 @@ using ForwardDiff: ForwardDiff, Dual
 
 ## Sparse AD Support
 using SparseArrays: AbstractSparseMatrix, SparseMatrixCSC
+using SparseConnectivityTracer: TracerSparsityDetector
 
 @reexport using SciMLBase, SimpleNonlinearSolve
 

src/NonlinearSolve.jl

@@ -197,7 +197,7 @@ end
 function sparsity_detection_alg(f::NonlinearFunction, ad::AutoSparse)
     if f.sparsity === nothing
         if f.jac_prototype === nothing
-            is_extension_loaded(Val(:Symbolics)) && return SymbolicsSparsityDetection()
+            # is_extension_loaded(Val(:Symbolics)) && return SymbolicsSparsityDetection()
             return ApproximateJacobianSparsity()
         else
             jac_prototype = f.jac_prototype