Revert "Add file not found exception"

This reverts commit 03d470e.

Author: xCollateral

src/main/java/net/vulkanmod/render/shader/ShaderLoadUtil.java

@@ -97,7 +97,7 @@ public static JsonObject getJsonConfig(String path, String rendertype) {
             }
 
             if (stream == null) {
-                throw new FileNotFoundException("Config at %s not found".formatted(path));
+                return null;
             }
 
             JsonElement jsonElement = JsonParser.parseReader(new BufferedReader(new InputStreamReader(stream)));