fix: code generators (#1985)

Co-authored-by: liyasthomas <liyascthomas@gmail.com>

packages/hoppscotch-app/helpers/codegen/generators/nodejs-native.js

@@ -43,16 +43,11 @@ export const NodejsNativeCodegen = {
     let requestBody
     if (["POST", "PUT", "PATCH", "DELETE"].includes(method)) {
       requestBody = rawInput ? rawParams : rawRequestBody
-      if (isJSONContentType(contentType)) {
+      if (isJSONContentType(contentType) && requestBody) {
         requestBody = `JSON.stringify(${requestBody})`
-      } else {
+      } else if (requestBody) {
         requestBody = `\`${requestBody}\``
       }
-      if (contentType) {
-        genHeaders.push(
-          `    "Content-Type": "${contentType}; charset=utf-8",\n`
-        )
-      }
     }
 
     if (headers) {
@@ -62,7 +57,7 @@ export const NodejsNativeCodegen = {
     }
     if (genHeaders.length > 0 || headers.length > 0) {
       requestString.push(
-        `  headers: {\n${genHeaders.join("").slice(0, -2)}\n  }`
+        `  headers: {\n${genHeaders.join("").slice(0, -2)}\n  }\n`
       )
     }
     requestString.push(`};\n\n`)