examples/groq: fixup groq example (#1385)

examples/groq-completion-example/go.mod

@@ -2,10 +2,7 @@ module github.com/tmc/langchaingo/examples/groq-completion-example
 
 go 1.24.3
 
-require (
-	github.com/joho/godotenv v1.5.1
-	github.com/tmc/langchaingo v0.1.14-pre.3
-)
+require github.com/tmc/langchaingo v0.1.14-pre.3
 
 replace github.com/tmc/langchaingo => ../..
 

examples/groq-completion-example/go.sum

@@ -6,8 +6,6 @@ github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
-github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/pkoukk/tiktoken-go v0.1.6 h1:JF0TlJzhTbrI30wCvFuiw6FzP2+/bR+FIxUdgEAcUsw=
 github.com/pkoukk/tiktoken-go v0.1.6/go.mod h1:9NiV+i9mJKGj1rYOT+njbv+ZwA/zJxYdewGl6qVatpg=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=

examples/groq-completion-example/groq_completion_example.go

@@ -6,21 +6,15 @@ import (
 	"log"
 	"os"
 
-	"github.com/joho/godotenv"
 	"github.com/tmc/langchaingo/llms"
 	"github.com/tmc/langchaingo/llms/openai"
 )
 
 func main() {
-	err := godotenv.Load()
-	if err != nil {
-		log.Fatalf("Error loading .env file")
-	}
-
 	apiKey := os.Getenv("GROQ_API_KEY")
 
 	llm, err := openai.New(
-		openai.WithModel("llama3-8b-8192"),
+		openai.WithModel("moonshotai/kimi-k2-instruct"),
 		openai.WithBaseURL("https://api.groq.com/openai/v1"),
 		openai.WithToken(apiKey),
 	)