error-guide: remove invalid_package_name

error-guides/parser/invalid_package_name.md

@@ -1,28 +0,0 @@
-# Invalid package name
-
-## Example
-
-This error occurs when a package name in an `import` contains invalid characters.
-
-Erroneous code example:
-
-```js
-import FOO.bar;
-```
-
-The compiler will reject this code with, for example...:
-
-```js
-Error [EPAR0370012]: package names must be lowercase alphanumeric ascii with underscores
-    --> test.leo:1:8
-     |
-   1 | import FOO.bar;
-     |        ^^^
-```
-
-In this specific case, you probably meant `foo.bar` instead.
-If so, so you can solve the problem with:
-
-```js
-import foo.bar;
-```