Removed the base unit stuff as it is not needed

dbrepo-metadata-db/setup-schema.sql

@@ -160,7 +160,6 @@ CREATE TABLE IF NOT EXISTS `mdb_columns`
     d                INT,
     auto_generated   BOOLEAN               DEFAULT false,
     is_null_allowed  BOOLEAN      NOT NULL DEFAULT true,
-    base_unit        VARCHAR(100) NULL,
     val_min          NUMERIC      NULL,
     val_max          NUMERIC      NULL,
     mean             NUMERIC      NULL,

dbrepo-metadata-service/api/src/main/java/at/tuwien/api/database/table/columns/ColumnDto.java

@@ -93,10 +93,6 @@ public class ColumnDto {
     @Field(name = "d", type = FieldType.Integer)
     private Integer d;
 
-    @Schema(example = "KELVIN")
-    @Field(name = "base_unit", type = FieldType.Keyword)
-    private String baseUnit;
-
     @Schema(example = "0")
     @Field(name = "val_min", type = FieldType.Double)
     private BigDecimal valMin;

dbrepo-metadata-service/entities/src/main/java/at/tuwien/entities/database/table/columns/TableColumn.java

@@ -116,9 +116,6 @@ public class TableColumn implements Comparable<TableColumn> {
     @Column
     private Integer d;
 
-    @Column(name = "base_unit")
-    private String baseUnit;
-
     @Column(name = "val_min")
     private BigDecimal valMin;
 

dbrepo-search-db/init/indices/column.json

@@ -36,9 +36,6 @@
       "val_min": {
         "type": "double"
       },
-      "base_unit": {
-        "type": "keyword"
-      },
       "val_max": {
         "type": "double"
       },