Remove .solcover.js solc config options / hard-code shanghai evm version

.solcover.js

@@ -1,27 +1,4 @@
 module.exports = {
-    configureYulOptimizer: true,
-    solcOptimizerDetails: {
-        yul: true,
-        yulDetails: {
-            optimizerSteps:
-                'dhfoDgvlfnTUtnIf' +                // None of these can make stack problems worse
-                '[' +
-                    'xa[r]EscLM' +                  // Turn into SSA and simplify
-                    'cCTUtTOntnfDIl' +              // Perform structural simplification
-                    'Lcl' +                         // Simplify again
-                    'Vcl [j]' +                     // Reverse SSA
-
-                // should have good 'compilability' property here.
-
-                    'Tpel' +                        // Run functional expression inliner
-                    'xa[rl]' +                      // Prune a bit more in SSA
-                    'xa[r]cL' +                     // Turn into SSA again and simplify
-                    'gvf' +                         // Run full inliner
-                    'CTUca[r]LSsTFOtfDnca[r]Ilc' +  // SSA plus simplify
-                ']' +
-                'jml[jl] VcTOcl jml : fDnTOcm',     // Make source short and pretty
-        },
-    },
     skipFiles: [
         'mocks', 'tests', 'interfaces',
     ],

hardhat.config.ts

@@ -29,7 +29,7 @@ const config: HardhatUserConfig = {
                 enabled: true,
                 runs: 1000000,
             },
-            evmVersion: (networks[getNetwork()] as HardhatNetworkUserConfig)?.hardfork || 'shanghai',
+            evmVersion: 'shanghai',
             viaIR: true,
         },
     },