Remove unneeded check if crates is empty

Author: mo8it

src/main.rs

@@ -209,9 +209,7 @@ fn main() -> Result<()> {
                 .exercises_to_json(exercises)
                 .expect("Couldn't parse rustlings exercises files");
 
-            if project.crates.is_empty() {
-                println!("Failed find any exercises, make sure you're in the `rustlings` folder");
-            } else if project.write_to_disk().is_err() {
+            if project.write_to_disk().is_err() {
                 println!("Failed to write rust-project.json to disk for rust-analyzer");
             } else {
                 println!("Successfully generated rust-project.json");

src/project.rs

@@ -12,7 +12,7 @@ use crate::exercise::Exercise;
 #[derive(Serialize, Deserialize)]
 pub struct RustAnalyzerProject {
     sysroot_src: String,
-    pub crates: Vec<Crate>,
+    crates: Vec<Crate>,
 }
 
 #[derive(Serialize, Deserialize)]