Remove ajv from plugin webpack config

The ajv module was made shared to reduce package size, but it turned out
the package size was large because of a missunderstanding in how imports
to sub-paths works with module federation.  Since that was fixed the ajv
module was no longer shared, but plugins incorrectly still specified it.

plugins/global_chat/webpack.config.js

@@ -25,7 +25,6 @@ module.exports = (env = {}) => merge(common(env), {
 			shared: {
 				"@clusterio/lib": { import: false },
 				"@clusterio/web_ui": { import: false },
-				"ajv": { import: false },
 			},
 		}),
 	],

plugins/inventory_sync/webpack.config.js

@@ -26,7 +26,6 @@ module.exports = (env = {}) => merge(common(env), {
 			shared: {
 				"@clusterio/lib": { import: false },
 				"@clusterio/web_ui": { import: false },
-				"ajv": { import: false },
 				"antd": { import: false },
 				"react": { import: false },
 				"react-dom": { import: false },

plugins/research_sync/webpack.config.js

@@ -25,7 +25,6 @@ module.exports = (env = {}) => merge(common(env), {
 			shared: {
 				"@clusterio/lib": { import: false },
 				"@clusterio/web_ui": { import: false },
-				"ajv": { import: false },
 			},
 		}),
 	],

plugins/statistics_exporter/webpack.config.js

@@ -25,7 +25,6 @@ module.exports = (env = {}) => merge(common(env), {
 			shared: {
 				"@clusterio/lib": { import: false },
 				"@clusterio/web_ui": { import: false },
-				"ajv": { import: false },
 			},
 		}),
 	],