contracts-bedrock: delete dead script

This script is no longer used and generates no artifacts. The artifacts
are currently exported by path and the JSON files can be imported.
While this style of artifact getter API is nice, it causes the bundle
size for frontends to be very large and they cannot shake all of the
unused artifacts out since any can be requested at runtime.

packages/contracts-bedrock/scripts/generate-artifacts.ts

-import path from 'path'
-import fs from 'fs'
-
-import glob from 'glob'
-
-/**
- * Script for automatically generating a file which has a series of `require` statements for
- * importing JSON contract artifacts. We do this to preserve browser compatibility.
- */
-const main = async () => {
-  const contractArtifactsFolder = path.resolve(
-    __dirname,
-    `../artifacts/contracts`
-  )
-
-  const artifactPaths = glob
-    .sync(`${contractArtifactsFolder}/**/*[!.t].sol/**.json`)
-    .filter((match) => {
-      // Filter out the debug outputs.
-      return !match.endsWith('.dbg.json')
-    })
-
-  const content = `
-    /* eslint-disable @typescript-eslint/no-var-requires, no-empty */
-    /*
-    THIS FILE IS AUTOMATICALLY GENERATED.
-    DO NOT EDIT.
-    */
-
-    ${artifactPaths
-      .map((artifactPath) => {
-        // eslint-disable-next-line @typescript-eslint/no-var-requires
-        const artifact = require(artifactPath)
-        // handles the case - '\u' (\utils folder) is considered as an unicode encoded char
-        const pattern = /\\/g
-        const relPath = path
-          .relative(__dirname, artifactPath)
-          .replace(pattern, '/')
-        return `
-        let ${artifact.contractName}
-        try {
-          ${artifact.contractName} = require('${relPath}')
-        } catch {}
-        `
-      })
-      .join('\n')}
-
-    export const getContractArtifact = (name: string): any => {
-      return {
-        ${artifactPaths
-          .map((artifactPath) => {
-            // eslint-disable-next-line @typescript-eslint/no-var-requires
-            const artifact = require(artifactPath)
-            return `${artifact.contractName}`
-          })
-          .join(',\n')}
-      }[name]
-    }
-    `
-
-  fs.writeFileSync(
-    path.resolve(__dirname, `../src/contract-artifacts.ts`),
-    content
-  )
-}
-
-main()