Remove global NewBatch function

Batch should behave like Query, and need to be created from a session.

patch by Oleksandr Luzhniy; reviewed by João Reis, Danylo Savchenko, for CASSGO-15

Author: tengu-alt

CHANGELOG.md

@@ -12,6 +12,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Don't restrict server authenticator unless PasswordAuthentictor.AllowedAuthenticators is provided (CASSGO-19)
 
+- Remove global NewBatch function (CASSGO-15)
+
 ### Fixed
 
 ## [1.7.0] - 2024-09-23

session.go

@@ -1747,18 +1747,6 @@ type Batch struct {
 	routingInfo *queryRoutingInfo
 }
 
-// NewBatch creates a new batch operation without defaults from the cluster
-//
-// Deprecated: use session.NewBatch instead
-func NewBatch(typ BatchType) *Batch {
-	return &Batch{
-		Type:        typ,
-		metrics:     &queryMetrics{m: make(map[string]*hostMetrics)},
-		spec:        &NonSpeculativeExecution{},
-		routingInfo: &queryRoutingInfo{},
-	}
-}
-
 // NewBatch creates a new batch operation using defaults defined in the cluster
 func (s *Session) NewBatch(typ BatchType) *Batch {
 	s.mu.RLock()