laser/instruction: remove unused solver in sstore_()

mythril/laser/ethereum/instructions.py

@@ -18,7 +18,6 @@ from z3 import (
     URem,
     SRem,
     BitVec,
-    Solver,
     is_true,
     BitVecVal,
     If,
@@ -43,7 +42,6 @@ from mythril.laser.ethereum.transaction import (
     TransactionStartSignal,
     ContractCreationTransaction,
 )
-from mythril.analysis.solver import get_model
 
 TT256 = 2 ** 256
 TT256M1 = 2 ** 256 - 1
@@ -924,9 +922,6 @@ class Instruction:
             storage_keys = global_state.environment.active_account.storage.keys()
             keccak_keys = filter(keccak_function_manager.is_keccak, storage_keys)
 
-            solver = Solver()
-            solver.set(timeout=1000)
-
             results = []
             new = False